94 eg mini me swap (D15B block,D16Y8 head, D16Z6 tranny). ok so i finally got the car finished took it out for a spin drives beautifully, other than the fact i need to change the clutch. after a little while of following my buddy we determined the speedo reads 10 mph over (i.e. doing 30 reads 40). i know the tire size is not that much diff what else could cause this? speed sensor? cluster? nething else?

 

A JDM speed sensor can throw off your mph. But let us know what tire size you are running.